com.example.Error.Detailed.* Error Domain

com.example.Error.Detailed.* Error Domain — Detailed errors

{
  com.example.Error.Detailed.Failed,
  com.example.Error.Detailed.Permissions.TooCool
}

Another error domain declaration.

`com.example.Error.Detailed.Failed`	Something went wrong
`com.example.Error.Detailed.Permissions.TooCool`	FIXME: not documented.